IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE FAST CMOS OCTAL BUFFER/LINE DRIVER IDT74FCT540AT/CT FEATURES: DESCRIPTION: − − − The IDT octal buffer/line driver is built using an advanced dual metal CMOS technology. The FCT540T is similar in function to the FCT240T, except that the inputs and outputs are on opposite sides of the package. This pinout arrangement makes these devices especially useful as output ports for microprocessors and as backplane drivers, allowing ease of layout and greater board density. − − − − − Low input and output leakage ≤1µ A (max.) CMOS power levels True TTL input and output compatibility • VOH = 3.3V (typ.) • VOL = 0.3V (typ.) Meets or exceeds JEDEC standard 18 specifications A and C speed grades High drive outputs (-15mA IOH, 64mA IOL) Power off disable outputs permit “live insertion” Available in SOIC, SSOP, and QSOP packages FUNCTIONAL BLOCK DIAGRAM OE A OE B D0 O0 D1 O1 D2 O2 D3 O3 D4 O4 D5 O5 D6 O6 D7 O7 INDUSTRIAL TEMPERATURE RANGE AUGUST 2000 1 c 1999 Integrated Device Technology, Inc. DSC-5588/- IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION V CC Symbol VTERM(2) Rating Terminal Voltage with Respect to GND Max. –0.5 to +7 Unit V OE B VTERM(3) Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V 18 O0 TSTG Storage Temperature –65 to +150 °C 17 O1 IOUT DC Output Current –60 to +120 1 20 D0 2 19 D1 3 D2 4 D3 5 OE A O2 D5 SO20-2 16 SO20-7 6 SO20-8 15 14 7 D6 8 13 O5 D7 9 12 O6 10 11 O7 D4 GND mA 8T-link NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. No terminal voltage may exceed Vcc by +0.5V unless otherwise noted. O3 O4 2. Inputs and Vcc terminals only. 3. Outputs and I/O terminals only. CAPACITANCE (TA = +25OC, f = 1.0MHz) SOIC/ SSOP/ QSOP TOP VIEW Symbol CIN Parameter(1) Input Capacitance Conditions VIN = 0V Typ. 6 Max. 10 COUT Output Capacitance VOUT = 0V 8 12 Unit pF pF 8T-link NOTE: 1. This parameter is measured at characterization but not tested. PIN DESCRIPTION Pin Names OEA, OEB Description 3–State Output Enable Inputs (Active LOW) Dx Inputs Ox Outputs FUNCTION TABLE OEA Inputs OEB D Outputs L L L H L L H L H H X Z NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don’t Care Z = High-Impedance 2 (1) IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5% Symbol VIH Parameter Input HIGH Level Test Conditions(1) Guaranteed Logic HIGH Level VIL Input LOW Level Guaranteed Logic LOW Level IIH Input HIGH Current(4) VCC = Max. IIL Input LOW Current(4) IOZH High Impedance Output Current IOZL (3-State output pins) (4) II Input HIGH Current(4) VCC = Max., VI = VCC (Max.) VIK Clamp Diode Voltage VCC = Min., IIN = –18mA VH Input Hysteresis ICC Quiescent Power Supply Current VI = 2.7V VCC = Max. Min. 2 Typ.(2) — Max. — Unit V — — 0.8 V — — ±1 µA VI = 0.5V — — ±1 VO = 2.7V — — ±1 VO = 0.5V — — ±1 — — ±1 µA µA — –0.7 –1.2 V — — 200 — mV VCC = Max., VIN = GND or VCC — 0.01 1 mA Min. 2.4 Typ.(2) 3.3 Max. — Unit V OUTPUT DRIVE CHARACTERISTICS Symbol VOH Parameter Output HIGH Voltage VOL Output LOW Voltage IOS Short Circuit Current Test Conditions(1) IOH = –8mA VCC = Min. VIN = VIH or VIL IOH = –15mA 2 3 — VCC = Min. VIN = VIH or VIL VCC = Max, VO = GND (3) IOL = 64mA — 0.3 0.55 V –60 –120 –225 mA NOTES: 1. For conditions shown as max. or min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. The test limit for thie parameter is ±5µA at TA = -55°C. 3 IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ∆ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Test Conditions(1) Min. — Typ.(2) 0.5 Max. 2 Unit mA VIN = VCC VIN = GND — 0.15 0.25 mA/ MHz VIN = VCC — 1.5 3.5 mA VIN = 3.4 VIN = GND — 1.8 4.5 VCC = Max. VIN = VCC — 3 6(5) Outputs Open fi = 2.5MHz 50% Duty Cycle VIN = GND — 5 14(5) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open OEA = OEB = GND IC One Input Toggling 50% Duty Cycle VCC = Max. Total Power Supply Current(6) Outputs Open fi = 10MHz 50% Duty Cycle VIN = GND OEA = OEB = GND One Bit Toggling VIN = 3.4 VIN = GND OEA = OEB = GND Eight Bits Toggling NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi) ICC = Quiescent Current ∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fi = Input Frequency Ni = Number of Inputs at fi All currents are in milliamps and all frequencies are in megahertz. SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT540AT Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay DN to ON Output Enable Time Condition(1) Min.(2) CL = 50pF RL = 500Ω Output Disable Time FCT540CT Max. Min.(2) Max. Unit 1.5 4.8 1.5 4.3 ns 1.5 6.2 1.5 5.8 ns 1.5 5.6 1.5 5.2 ns NOTES: 1. See Test Circuit and Waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 4 IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS SWITCH POSITION TEST CIRCUITS FOR ALL OUTPUTS V CC Test 7.0V Switch Open Drain 500 Ω Disable Low V OUT V IN Pulse Generator D.U.T. All Other Tests 50pF R Closed Enable Low T C Open 8-link 500 Ω DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. L O ctal lin k PULSE WIDTH SET-UP, HOLD, AND RELEASE TIMES 3V 1.5V 0V 3V 1.5V 0V DATA INPUT tH t SU TIM ING INPUT ASYNCHRONOUS C ONTROL PRES ET CLEAR ETC. SYNCHRO NOUS CONTRO L PRES ET CLEAR CLOCK ENABLE ETC. t REM t SU LO W -HIGH-LOW PULSE 1.5V tW 3V 1.5V 0V HIGH-LOW -HIGH PULSE 1.5V 3V 1.5V 0V tH O ctal lin k O ctal lin k PROPAGATION DELAY ENABLE AND DISABLE TIMES ENAB LE SAM E PHASE INPUT TRANSITION t PLH t PH L OUTPUT t PLH OPPOSITE P HASE INPUT TRANSITION t PH L 3V 1.5V 0V DISA BLE 3V CO NTROL INPUT 1.5V t PZL V OH 1.5V V OL OUTPUT NO RM A LLY LO W 3V 1.5V 0V SW ITCH CLOSE D O ctal lin k SW ITCH OPEN 3.5V 3.5V 1.5V 0.3V t PZH OUTPUT NO RM A LLY HIGH 0V t PLZ V OL t PHZ 0.3V V OH 1.5V 0V 0V O ctal lin k NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 5 IDT74FCT540AT/CT FAST CMOS OCTAL BUFFER/LINE DRIVER INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Temperature Range FCT X X Device Type Package SO PY Q Small Outline IC (SO20-2) Shrink Small Outline Package (SO20-7) Quarter-size Small Outline Package (SO20-8) 540AT 540CT Fast CMOS Octal Buffer/Line Driver 74 - 40°C to +85°C CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com* *To search for sales office near you, please click the sales button found on our home page or dial the 800# above and press 2. The IDT logo is a registered trademark of Integrated Device Technology, Inc. 6